According to Willem Oosthoek and Michel Bollee's book, Maserati Tipo 151, this is chassis 006, one of the two Briggs Cunningham cars. Thence to Chuck Jones Team Meridian, and so on. Lately in the Rosso Bianco collection until its breakup. Has had a lot of modifications over the years, many due the car's conversion to a street machine while owned by Jones. That had to be something else!Tom